JEALOUS is Dir En Grey's first single.
- This single was sold in advance on May 5, 1998, the day the fanclub was founded.
- All three versions of this single have the same catalogue number (FWR004-CDS) on their booklet. However, the 1998 versions' ISBN number ends in 435, while the re-release's ISBN ends in 044. The 1998 versions can be separated by looking at their CD's or plastic sleeve's catalogue number, as shown below.
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